Here is the full list of all 13 Xenoraid: The First Space War achievements.
Destroy eight or more enemies with a single Cluster Bomb
Destroy six or more enemies with a single Railgun blast
Complete campaign in Hard Mode
Complete Battle 5
Complete Battle 4
Complete Battle 3
Score 20000 points or more in Survival III
Destroy 400 enemies in Survival II
Survive seven minutes or more in Survival I
Complete Battle 2
Finish Battle 2 with four pilots ranked as Major
Destroy 500 enemies with a single fighter during a Battle
Complete Battle 1